Collectors aside, think about your responsibilities. You are so fortunate to have this documentation. It is an important part of the donation. And yes, it does matter about keeping the information about the packaging linked to the item. This is the same as with other objects that may come with boxes – hats, for instance. The boxes are also artifacts. And best not to store the items in the boxes, unless they have never been unpacked. Even then, think about what protects the item best. The packaging will not be made of archival materials. It does take up more room to store them separately, but that is one of the considerations about accepting or not accepting the gift. Can you take care of it properly?